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Finding the Fourth Proportional to 312,794.33, 431,656.90 and 169,553.72

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Solution

The fourth proportional to 312,794.33, 431,656.90 and 169,553.72 is: 233,984.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,794.33 : 431,656.90 = 169,553.72 : x
  2. Step 2: Convert to fraction form
    312,794.33/431,656.90 = 169,553.72/x
  3. Step 3: Cross multiply
    312,794.33x = 431,656.90 × 169,553.72
  4. Step 4: Simplify right side
    312,794.33x = 73,189,033,813.93
  5. Step 5: Solve for x
    x = 73,189,033,813.93/312,794.33
  6. Step 6: Final answer
    x = 233,984.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.